<style>
  div{

    padding:10px;
    /*
    border:1px dashed red;
    margin:10px;
    */
    float:left;
  }
    ul{
    /*border:1px solid blue;*/
    padding:0px;
    float:left;

  }
  ul li{
    border:1px solid white;
    border-radius:10px;
    list-style:none;
    width:100px;
    background-color:#000000;
    color:#FFFFFF;
    font-size:30px;
    font-family:"Arial";
    text-align:center;
    padding:10px 0px;
  }
  .header ul li{
    float:left;
  }
  ul li:hover{
    background-color:gray;
    /*cursor:pointer;*/
  }
  li a{
    text-decoration:none;
    color:white;
  }
  .main{
    width:60%;
    text-align:justify;
  }
</style>

<div class="container">
  <div class="header">
    <ul>
      <li><a href="http://google.com">One</a></li>
      <li><a href="#">Two</a></li>
      <li><a href="#">Three</a></li>
      <li><a href="#">Four</a></li>
      <li><a href="#">Five</a></li>
    </ul>
  </div><!-- header -->

  <div class="content">
    <div class="left">
      <ul>
        <li><a href="http://google.com">One</a></li>
        <li><a href="#">Two</a></li>
        <li><a href="#">Three</a></li>
        <li><a href="#">Four</a></li>
        <li><a href="#">Five</a></li>
      </ul>
    </div><!-- left -->
    <div class="main">
      <p>Firefox can't find the server at addons.mozilla.org.</p>

    <p>Check the address for typing errors such as ww.example.com instead of www.example.com</p>
    <p>If you are unable to load any pages, check your computer's network connection.
    If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web.</p>

    <p>Firefox can't find the server at addons.mozilla.org.</p>

    <p>Check the address for typing errors such as ww.example.com instead of www.example.com
    If you are unable to load any pages, check your computer's network connection.
    If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web.</p>

    <p>Firefox can't find the server at addons.mozilla.org.</p>


    </div><!-- main -->
  </div><!-- content -->

</div><!-- container -->
